1. A Wheat WRKY Transcription Factor TaWRKY10 Confers Tolerance to Multiple Abiotic Stresses in Transgenic Tobacco
- Author
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Ningcong Yao, Pengyi Deng, Wei Hu, Liulin Chen, Guangxiao Yang, Guangyuan He, Xiatian Wang, Hui Ma, Ying Feng, Chen Wang, and Ruihong Chai
- Subjects
Nicotiana tabacum ,Gene Identification and Analysis ,lcsh:Medicine ,Genetically modified crops ,Plant Science ,Sodium Chloride ,Biochemistry ,Immunoenzyme Techniques ,Cloning, Molecular ,lcsh:Science ,Triticum ,Plant Proteins ,Multidisciplinary ,biology ,Plant Biochemistry ,Reverse Transcriptase Polymerase Chain Reaction ,Genetically Modified Organisms ,food and beverages ,Agriculture ,Salt Tolerance ,Oxidants ,Plants, Genetically Modified ,Adaptation, Physiological ,Cell biology ,Droughts ,Cold Temperature ,Blotting, Southern ,Plant Physiology ,Wheat ,Rabbits ,Research Article ,Biotechnology ,Subcellular Fractions ,Transcriptional Activation ,Transgene ,Blotting, Western ,Cereals ,Crops ,Germination ,Real-Time Polymerase Chain Reaction ,Molecular Genetics ,Stress, Physiological ,Tobacco ,Genetics ,Animals ,RNA, Messenger ,Transcription factor ,Gene ,Biology ,Transgenic Plants ,Nicotiana ,Abiotic stress ,lcsh:R ,Hydrogen Peroxide ,biology.organism_classification ,Molecular biology ,WRKY protein domain ,Immunoglobulin G ,lcsh:Q ,Plant Biotechnology ,Reactive Oxygen Species ,Transcription Factors - Abstract
WRKY transcription factors are reported to be involved in defense regulation, stress response and plant growth and development. However, the precise role of WRKY transcription factors in abiotic stress tolerance is not completely understood, especially in crops. In this study, we identified and cloned 10 WRKY genes from genome of wheat (Triticum aestivum L.). TaWRKY10, a gene induced by multiple stresses, was selected for further investigation. TaWRKY10 was upregulated by treatment with polyethylene glycol, NaCl, cold and H2O2. Result of Southern blot indicates that the wheat genome contains three copies of TaWRKY10. The TaWRKY10 protein is localized in the nucleus and functions as a transcriptional activator. Overexpression of TaWRKY10 in tobacco (Nicotiana tabacum L.) resulted in enhanced drought and salt stress tolerance, mainly demonstrated by the transgenic plants exhibiting of increased germination rate, root length, survival rate, and relative water content under these stress conditions. Further investigation showed that transgenic plants also retained higher proline and soluble sugar contents, and lower reactive oxygen species and malonaldehyde contents. Moreover, overexpression of the TaWRKY10 regulated the expression of a series of stress related genes. Taken together, our results indicate that TaWRKY10 functions as a positive factor under drought and salt stresses by regulating the osmotic balance, ROS scavenging and transcription of stress related genes.
- Published
- 2013